Cone 03 bowl has the strength of high-fire porcelain

This bowl is 18cm (7") tall and weighs 1.8kg (4 lb). The marbling was achieved by wedging together white and colored Zero3 fritware porcelains, then thrown on the potters wheel and tooled at leather hard stage. The base is much thicker than the lip yet the degree of maturity appears homogeneous (despite a firing to cone 03 in less than 4 hours). I broke this with a hammer and with difficulty, it has the same kind of vitrified character as a high temperature porcelain.

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Zero3
The designation for a group recipes for body, glaze and engobe (by Tony Hansen), that potters can use to make low fire stoneware and fritware porcelain at 1100C (2000F) or cone 03.

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